---
title: "How do I set the response headers and response type in a Basic I/O function?"
url: https://docs.catalyst.zoho.com/en/faq/serverless/basicio-headers/
description: "Basic I/O functions do not support native HTTP requests and response headers. Therefore, you won't be able to set the response headers and response type in …"
last_updated: 2026-11-13T05:00:22Z
service: Serverless
type: faq
---

Basic I/O functions do not support native HTTP requests and response headers. Therefore, you won't be able to set the response headers and response type in Basic I/O functions. You can instead use Advanced I/O functions, as they support native HTTP requests and response headers.